<!DOCTYPE html>
<html lang="zh">

<head>
    <title></title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
    <link href="../css/style.css" rel="stylesheet"> </head>

<body>
    <div id="myApp">
        <h1>人生加法</h1>
        <add-method :a="6" :b="12" v-on:add_event="getAddResult"></add-method>
        <hr/>
        <h3>{{result}}</h3>
    </div>
    <script>
        Vue.component('add-method', {
            props: ['a', 'b'],
            template: '<div><button v-on:click="add">加吧</button></div>',
            methods: {
                add: function() {
                    var value = 0;
                    value = this.a + this.b;
                    this.$emit('add_event', {
                        result: value
                    });
                }
            },
        });
        var myApp = new Vue({
            el: '#myApp',
            data: {
                result: 0
            },
            methods: {
                getAddResult: function(pval) {
                    this.result = pval.result;
                }
            },
        });
    </script>
</body>

</html>